| (19) |
 |
|
(11) |
EP 0 947 857 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
26.07.2000 Bulletin 2000/30 |
| (43) |
Date of publication A2: |
|
06.10.1999 Bulletin 1999/40 |
| (22) |
Date of filing: 12.03.1999 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
Designated Extension States: |
|
AL LT LV MK RO SI |
| (30) |
Priority: |
24.03.1998 EP 98200928
|
| (71) |
Applicant: Akzo Nobel N.V. |
|
6824 BM Arnhem (NL) |
|
| (72) |
Inventors: |
|
- Bos, Willem
6836 JP Arnhem (NL)
- Breeveld, Ricardo Henry
6983 HJ Doesburg (NL)
- Vertommen, Luc Louis Théophile
6931 VJ Westervoort (NL)
|
| (74) |
Representative: Duxbury, Stephen |
|
Arnold & Siedsma, Sweelinckplein 1
2517 GK Den Haag
2517 GK Den Haag (NL) |
|
| |
|
| (54) |
Process for providing an optical element and optical element obtainable by such a
process |
(57) Process for providing an essentially homogeneous optical element, for example an
optical lens, comprising the steps of:
- filling a mould with a mixture comprising one or more monomers, one or more initers,
and one or more radical polymerization initiators, the degree of polymerization of
the monomers during filling being less than 5 % by weight,
- polymerizing said mixture such that more than 90 % by weight of all monomer is polymerized,
and
- removing the essentially homogeneous optical element from the mould.